<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
     <!--准备好一个容器-->
     <div id="root">
       姓:<input type="text" v-model="firstName"><br/><br/>
       名:<input type="text" v-model="lastName"><br/><br/>
       全名:<span>{{firstName}}-{{lastName}}</span>
     </div>
</body>
  <script>
      new Vue({
        el:'#root',
        data:{
            firstName:'张',
            lastName:'三'
        }
      })
  </script>
</html>